<?php

/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/

namespace Symfony\Component\Mime;

use Symfony\Component\Mime\Exception\LogicException;

/**
* @author Fabien Potencier <fabien@symfony.com>
*/
class RawMessage implements \Serializable
{
/**
* @var iterable|string
*/
private $message;

/**
* @param iterable|string $message
*/
public function __construct($message)
{
$this->message = $message;
}

public function toString(): string
{
if (\is_string($this->message)) {
return $this->message;
}
if ($this->message instanceof \Traversable) {
$this->message = iterator_to_array($this->message, false);
}

return $this->message = implode('', $this->message);
}

public function toIterable(): iterable
{
if (\is_string($this->message)) {
yield $this->message;

return;
}

$message = '';
foreach ($this->message as $chunk) {
$message .= $chunk;
yield $chunk;
}
$this->message = $message;
}

/**
* @throws LogicException if the message is not valid
*/
public function ensureValidity()
{
}

/**
* @internal
*/
final public function serialize(): string
{
return serialize($this->__serialize());
}

/**
* @internal
*/
final public function unserialize($serialized)
{
$this->__unserialize(unserialize($serialized));
}

public function __serialize(): array
{
return [$this->toString()];
}

public function __unserialize(array $data): void
{
[$this->message] = $data;
}
}